Intel 220T manual Understanding 210T Hubs, 210T Port LEDs, Partitioned ports, Status, Meaning

Understanding 210T Hubs

210T Port LEDs

The LEDs above each port provide information about the port’s configuration and status.

Left side:	Right side:
Green	Yellow

LED	Status	Meaning
Left	Solid green	Port has a link.
	Blinking green	Receive activity at port.
	Off	No link detected.
Right	Solid yellow	Port disabled by management (not applicable
		without optional Management Module).
	Blinking yellow	Speed mismatch. Check that device speed
		and hub speed match.
	Erratic blinking yellow	Port auto-disabled (partitioned). See below.
	Blinking yellow and	Out-of-specification cabling or port hardware
	Status LED blinking	problem. Try a different cable.

Partitioned ports

A port is automatically disabled (partitioned off) by the hub when an invalid condition occurs, such as too many consecutive collisions.

Once the hub sees a valid packet of data from the device, or is able to transmit data to the port, the hub automatically re-enables (unpartitions) the port. Clients are usually not affected by a partitioned port because the port is often unpartitioned very quickly.

Usually, a partitioned port indicates an overloaded network or a malfunctioning device (like an adapter card) on the network. To alleviate an overloaded network, segment so that fewer devices share the fixed amount of bandwidth.

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